Incandescent



(No Model.)

R D OU'BLEDAY. INGANDESOENT LAMP ATTACHMENT.

No. 383,046r Patented May 15,1888.

NITED STAT-Es PATENT OFFICE.

HARRY M. DOUBLEDAY, OF COLUMBUS, OHIO.

INCANDESCENT LAMP ATTACH MENT.

SPECIPICATIQN forming part of Letters i atent No. 383,046, dated May15,1888.

Application filed September 1, 1887. Serial No. 248,522. (No model.)

invention particularly consists in an arm having suitable means ofattachment to a gas fixture and provided with an insulating block orsleeve which is connected with the incandescent lamp, substantially ashereinafter de scribed.

In order that my invention may be fully understood, I will proceed todescribe the same with reference to the accompanying drawings, in whichFigure I represents a gasfixture in side ele vation, having incandescentelectric lamps applied by means of my improvement. Fig. II is a verticalsectional view of the attaching device.

1 may represent a chandelier, having customary gasburners, 2.

3 is an arm, which may be of brass and may have a hole at one end toembrace the gas fixture below the burner. This arm may be of therepresented curved or other form. Its free end supports the globe 4 ofthe incandescent lamp and the inelosed filament and conductors. Toprevent possibility of short circuiting or grounding of the current atthis point and the consequent affecting not only of the lamp soshort-circuited or grounded, but the whole number of lamps on thatcircuit, I provide an insulating block or sleeve, 5, which passesthrough a hole in end of arm 3, and is screwthreaded to enter a socketin the neck of the incandescent lamp-globe. A flange, 6, on the block orsleeve 5 rests against the arm 8on one side when the block or sleeve isscrewed to its seat, while a washer or collar, 7, of insulating materialsimilar to sleeve 5 is placed between the arm and the neck of the globe.Non-con ducting material is thus interposed between the arm 3 and theglobe at every point, and there is no possibility of contact of the armwith conductors .8, which pass through the hollow of sleeve 5.

Having thus described my invention, the following is what I-claim as newtherein and desire to secure by Letters Patent:

1. In combination with a supporting-arm, 3, having a perforation at oneend, a sleeve in said perforation having a flange pressed against saidarm, and an incandescent lamp supported on said sleeve on the oppositeside of the arm from the flange, substantially as set forth.

2. The combination of an electric lamp, a perforated arm or hanger, aninsulating flanged sleeve passed through the perforation and secured tothe lamp, and an insulating-collar interposed between the arm or hangerand the lamp, the said arm or hanger being adapted at its other end toengage a hook or projection, whereby the lamp is supported,substantially as shown and described.

3. The combination, with an electric lamp having a screw-threadedsocket, of a metallic or other arm or hanger having perforations in itsends, a flanged insulating-sleeve passing through one perforation andscrewing into the socket, and an insulatingcollar on the sleeve andplaced between the arm or hanger and the lampsocket, the perforation atthe other end of said arm or hanger being adaptedto fit over a gasfixture below the burner, as herein set forth.

HARRY M. DOUBLEDAY.

Witnesses:

Ooravrus KNIGHT, HARRY E. KNIGHT.

